Pump-cylinder.



lE. w. CLARK.

PUMP CYLINDER. I APPLICATION FILED OCT. 2l, I9I4.y 1,170,737. l Patented Feb. 8,A 1916.

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Y EDWIN w. .,cLARK, or emenda-ILLINOIS.

Pump-CYLINDER.

To'all whom it may concern.' Y

Be it known that I, EDWIN WV. CLARK, a-

citizen of the United States, residing at Chit cago, in the county of Cook andv State of Illinois, have invented a certain new and useful Improvement in 'Pump-Cylinders, 0f which the following is a specication.

My invention relates to pump cylinders,

more particularly of the type employed in ldeep wells. 5 l Y g It is well known to those conversant with this art that it is frequently'desirable to remove pump cylinders fromthe well cas'- ings in .which they are placed. Theoretically this'is a simple matter, but as a practical matter it is usually impossible to doso after the pump has been inoperation fora short time. -The difficulty is that as soon as the pump isput into operation, sand, lime or other sedimentary material immediately begins to lill in around theoutside of the cylindeigbetween the cylinder and the casing, and it is a peculiar fact, but a Vwell, known one, that `this sedimentary material instead of being loose and'granularlike sand, becomes in eect asolid piece of stone,

Vand eifectually 'prevents any movement whatever ofthe cylinder in the casing. The result is, that although'the commercialpump 'cylinders are theoretically removable, as a matter of fact they become quite immovable after a short space of time, usuallyafter casing andthe cylinder.

twoor three days, the time depending upon'V the amount of impurities in the nwater, etc."

The object of my invention isto provide means for preventing the deposition of any substance or its collection between Vthe wellV I accomplish my object'by the construc-v ings,in which'- Y t v Figure 1 1s a side elevatlon, chiefly 1n tion illustrated in the accompanying draw-- central longitudinal section showing a cylinder embodying my inventionin position in a well casing. Fig.` 2 isl a central vertical section of the parts at the upper end of the cylinder, Vthe figure showing then rubber packer expanded into contact with the well casing. The'plane of section is indicated by the'line Qf-Q, Fig. 3. Fig. 3 is similar to Fig. 2,' but shows the packer contracted;

Fig. 4 is a plan section on'k thelinel 4t, 11-

Fig. 2. Fig. 5 is a plan sectionronthe line,

5, 5 Fig. 1. Fig. 6 is a perspectiveview of a suitable form of seating tool.

sptcittatton of Letters Patent. Application filed October 21, 1914. Serial No.'867,712.

V in the .usual manner.

Patented rgb. sf, 1916.

SimilarV numerals refer tov similar partsthroughout the several views. l

Referringwtol the drawings, 1 represents thewell casing which forms the sides ofthe well. 4The pump cylinder 2 istub'ular in' form and is of a diameter somewhatless than the diameter of the well casing, there being' 'an annular space 3 formed between the cylinder and the casing. At the lowerv end the cylinder rterminates in a foot t, the design of whichlis immaterial so long asfit is open at the bottom for admitting water, and 'is adapted to' be operated by al seating tool. For the purpose of illustration I have.y shown in Fig. 5', vand 'at the bottom of Fig. 1 a coniiguration suitable for coperating withV the particular rform Vof seating tool shown in Fig. 6. VIn the form selected for illustration said 'seating' tool ,consists of a head 'formedat the lower end of a rod 7,

the said head beingoblong andadapte'dto t engage the horizontal" internal vflange -8 .in f' i the foot. Said flange has notches 9 through v which the headoffthe'sea-ting toolmay bey f Y lowered, andthe vertical 'ribslO beneath said flange prevent the seating tool from va.A

being rotated too far, the vaction being illusf trated in dotted lines Fig. 5. Thev foot is screwed oro'therwise fastened to the lower l Y 'mounting a valve' seat 12, the latter coper- `ating with; a vertically movable check valve 13. 1

Above the'foot valve is a piston, the form of whiclris immaterial as regards my present.4

Iinvention. Intlie form shown saidy piston consistsv of .aplungerflt the bottom of y which gisfinte'rnally threadedfor engaging j plungeris surmounted by ajcage'l'? and provided'with a` vertically'movable valve 18.v These parts are operated by afpump rod 19 I will now describe the parts more particularly concerned with my invention-#to wit,

i the threaded boss llocated atthe top of the' footvalve 'in the ordinary ntiarfmer Said the parts whereby sediment :is prevented from collecting between theV cylinder and tlie casing.

Secured to the upper end of the pump cylinder 2 is an eXternal annular flange 2l as shown at the upper end of Figs. 2 and 3'. By preference this flange is integral with' the cylinder and is produced by the sol-calledl spinning process. The outer diameter of this flange is almost but not quite equal to the inner diameter' .of the well casing, the flange being small enough to permit it to pass freely up through the well casing when the cylinder is to be withdrawn. T his flange serves as a top retainer for lthe annular packer 22 which consists of rubber or similar resilientsubstance. Said flange {iares outward and upward so that its outer sur-r faces produce` a wedging actionto crowd the material of the packer outward when the latter is pressed upward from beneath.

rlhe upper end of the pump Vcylinder' is externally threaded andV isY encircled by a spring dog-'which consists, in the main, of a sleeve 24 with springs25 thereon. Said sleeve is internally threaded to cooperate withthe external threaded portion of the cylinder, the result being that by producing relative rotation between the sleeve andthe cylinder, the cylinder rwill be raised or lowered relatively to the sleeve. By preference said springs are arrangedlongitudinally and are protectedl at the upper and lower ends by kcollars 26 yand 27V respectively.V Said springs are rigidly fastened at the one end to the sleeve 24 by rivets 219 or othersuitable means. The springs bow outwardly sufficiently to press with considerable force against the internal surface of the well casing, the purpose being to create enough fric.-y tion to hold the spring dog against rotation when the cylinder' is rotated. In order to reduce the friction between the top of the collar 27 and the base of the rubber packer 22 it is desirable to interpose a loose antifriction ring A30.

The operation is as followsg-Let it be assumed that the well casing is in place and that it is desi-red to lower the pump cylinder and associated partsinto place. The spring dog is backed off (that is, lowered on the cylinder) far enough to permit the diameter of the rubber packer 22 t0 contract to normal, as shown in Fig. 3, nthiscondi tion the packer is of small enough diameter to permit it to be freely lowered in the well casing. lhen' the dog, packerand cylinder have been brought tothe relative positoOns shown in Fig. 3, and the foot t has been fastened to the lower end of the cylinder, the empty cylinder is lowered into place by the aid of the seating tool 6, 7 The cylinder and parts mounted thereon are supported by the head of the seating tool which en# gages the underside of the internal flange 8.

By lowering the seating tool the empty cylinder Vbe lowered to the bottom of the flange la of the foot d. When the cylinder has been lowered to place, the seating tool is rotated in such direction as to cause the cylinder to screw downward in the spring dog, said dog being held against rotation by the springs 25 which press against the comparativelyr rough innery surface of the well casing. In consequence, the dog stands still while the cylinder descends, causing the liange 21 to press down upon the packer 22 and cause the'latter to bulge or thicken as illustrated inFig. 2. This action is continued-v until the packer forms a very tight joint between the cylinder and the casing, the rubber ordinarily even crowding up somewhat into the space between the pei-- imeter of the flange and the wall of the casing thuspreventing the formation of any nook or cranny where sediment may collect. To enhance this eHect, it is desirable that the flange 2l-be beveled somewhat, as shown in the drawings. Vlhen a tight joint has thus been effected, the seating tool is withdrawn from the well and the foot valve ll, l2, i3

is dropped into place. After this the 1piston is lowered Vinto the cylinder by the rod 19 and all is in readiness for the operation of the pump. lfl now, it is desired to remove the cylinder, the piston la is first lowered onto the feot valve, and rotated so that the threaded boss l5 of the foot valve will be engaged by the plunger 14C and lifted by it out of ther'well. Thev seating tool is then lowered into engagement` with the foot 4 and rotated in such direction as to cause the pumpz cylinder 2 to rise relatively to the dog, thus releasing the rubber packer 22 and permitting the latter to contract to normal condition, shown in Fig. 3. Thereupon, by raising the seating tool the cylinder and parts supported thereon may be lifted out of the well. Vith my construction there is no opportunity for sand or sediment to gather at any point` between theI well casing and the cylinder. IThe intermediate space 3 is open at the bottom and in fact the parts make no contact with the well casing except at the eXtreme upper end of the cylinder, and it will be understood that no sediment cangatherabove the` cylinder for the reason that the water is being actively agitated by every movement of the pump rod. ln conn sequence, as soon. as the rubber packer is released, there is nothing to prevent the rise of the cylinder and attached parts, except the friction of the springs 25 which may be readily overcome by exerting comparatively small upward pressure upon the rod 7 of the seating tool. Y

Having thus described nay-invention, what l claim as new and desire to secure by Letters Patent, is

l. Incombination, a tubular-,pump cylin-V flange on the upper end of the cylinder,

said flange flaring upwardly and outwardly, substantially as described. A

3. In a device of the class described, the combination of a pump cylinder having an external flange at its upper end, a resilient packing ring encircling said cylinder adjacent to said flange, a spring dog screwing on the upper end of said cylinder beneath said packing ring, a seating tool, and means on said cylinder' constructed to be engaged and disengaged by said seating tool for rotating said cylinder.

4. In a device of the classv described, the combination of a pump cylinder having at its upper end an upwardly and outwardly flaring flange, a resilient packing ring enproXimatelyA ycircling said cylinder beneath and adjacent to said flange, a tubular sleeve screwing on the outside of said cylinder adjacent to and beneath said ring, outwardly ybulging springs on said sleeve, said springs extending aplongitudinally and collars formed on said sleeve above and below said springs for protecting them, substantially vas described.l f

5. In a device of the class l described, the

combination o-f'a tubular well casing, a pump cylinder having an external flange at its upper end, the perimeter'of said flange being slightly less than the internal diameter of the well casing,a resilient packing ring surrounding said cylinder beneath and adjacent to the flange thereon, a spring dog screwing on said cylinder beneath and adjacent to said resilient ring, a foot on said cylinder, and a vseating tool adapted to engage and disenga'ge said foot for rotating said cylin-v der and raising and lowering the same.

. 6. In combination, a tubular pump cylinder having an integral flange flaring upward and outward from the top of the cyl-' inder to thereby produce a wedging action, 1

a resilient ring beneath said flange in contact therewith, and means for crowding upward against the bottomof saidv ring.

scribed my name in the presence of two witnesses.

EDWIN W. CLARK. Witnesses: i

HOWARD M. Cox, SELINA E. HIGGINS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patentsr Washington, D. C. f

e5 i In witness Vwhereof, I-have hereunto subl 

